q Dependence of Self-Energy Effects of the Plane Oxygen Vibration in YBa2Cu3O7

Author

• D. Reznik
• Bernard Keimer
• Fatih Dogan, Missouri University of Science and TechnologyFollow
• Ilhan A. Aksay

Abstract

We have measured the temperature dependence of the peak position and linewidth of the 42.5 meV phonon branch in a twinned single crystal of YBa₂Cu₃O₇ as a function of wave vector q. In the (100)/(010) direction in the Brillouin zone, considerable softening and broadening occur below the superconducting transition temperature T_c at some values of q. We observe an order of magnitude smaller softening and no linewidth broadening for q in the (110) / (1⁢1⁢0^-) direction. Possible implications of these findings for the symmetry of the superconducting order parameter are discussed.

Recommended Citation

D. Reznik et al., "q Dependence of Self-Energy Effects of the Plane Oxygen Vibration in YBa2Cu3O7," Physical Review Letters, vol. 75, no. 12, American Physical Society, Sep 1995.

The definitive version is available at https://doi.org/10.1103/PhysRevLett.75.2396

Department(s)

Materials Science and Engineering

International Standard Serial Number (ISSN)

1079-7114, 0031-9007

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2026 American Physical Society, All rights reserved

Publication Date

1995-09-18